So I was wiring up a switch to enable the user to choose if he's plugging 4 or 8 lights and I probably shorted something. I had connected the +5v, digitalPin 2 and the ground to my switch but forgot to put a tie down resistor. So when I switched it, my computer gave me a warning that the usb port was drawing too much power.
As described that could draw too much power but i don't see it hurting the arduino.
But now, the leds connected to digitalPin 11 and 12 are dimmed. It's not the leds as they work on other pins.
...I commented serialPrints and they started working properly. But now I'm having trouble with pins 6 and 7, yet 5 works. I'm not sure if they worked before as I had nothing connected before. I'm currently trying it out with the blink sketch (changing ledPin to 7, 6 and 5) so I'd be very surprised if it was a problem with the sketch. I also have nothing else connected or touchubg the board at the moment. Mind you, this time pin 6 and 7 are not dimmed, they just don't work at all.
Is there something special about pin 6 and 7 that I'm missing out on ? I don't mind connecting to say pin 5 and 4 but it seams I'm getting reliability issues here.
So this has moved around a lot.
What kind of board is it, did you buy it assembled or as a kit and which pins work/dont?
After some pocking around with the multimeter, turns out when either pin 6 or 7 is on, both out .7v and when they are off they still output .2v, contrarily to the stable 0 of the other pins.
This sounds specifically like a hardware short of both pins to something but the whole business of pins 11 & 12 and the serial don't fit with that.